Air cleaner for carburetors



y 1930- W.-G. DUNN 1,771,880

I AIR CLEANER FOR CARBURETORS Filed Aug. 6, 1928 I Jnvmfar ll 3712212216?: 171mm 7152215: 4257 a Patented July 29, 1930 UNITED STATES PATENTOFFICE WILLiAM G. DUNN, OF CLAJRINDA, IOWA AIR CLEANER FOB CABBURETORSApplication filed August 6, 1928. Serial No. 297,646.

The primary object of this invention is to provide an improvedconstruction for a device for receiving and cleanin atmospheric airpreliminary to its introduct1on to the car- Iburetor of an internalcombustion motor to prevent the entrance of dirt and other foreignparticles thereto.

A further object of the invention is to provide an improved air cleaningdevice for carburetors which has a manually operated controlling meansto permit the reception of air thereto either from the interior of avehicle body or from a point outside the body, such as under the hood.

Still another object of the invention is to provide an air cleaningdevice which has a cleaner housing and an intake thereto so arrangedthat the air entering the housing is caused to travel in acircumferential path and dust or other foreign particles carried by theair is thrown off by centrifugal force.

A further object is to provide a device of "the character described,which is simple and inexpensive to manufacture and which is easilyinstalled and which may be readily taken apart for cleaning purposes.

Still another ob ect is to provide an improved manually operated controldevice for the selective control for admission of air to the cleanerhousing.

. With these and other objects in view my invention consists in theconstruction, arrangement and combination of the various parts of mydevice, whereby the objects contemplated are attained, as hereinaftermore fully set forth, pointed out in my claims, and illustrated in theaccompanying drawings, in which:

Figure 1 is a perspective view partly in section, showing my improvedair cleaner device mounted in position for use.

Figure 2 is a 2-2 of Figure interior of the cleaner housing.

Figure 3 is a perspective view showing the diiferentdparts of thecleaner device in disassemble relation.

In the operation of internal combustion motors it is highly desirable toclean and purify the air which is employed in the fuel horizontalsection on the line 1, illustrating particularly the mixture before itsreception into the carburetor in order to remove dust, dirt, and otherforeign particles and thus prevent abrasive action on the cylinder wall,as well as to produce a better fuel mixture.

In the accompanying drawing, I have shown a cleaner device including acleaner housing which is formed ofa cylindrical side Wall 10 open atboth ends. A removable bottom 11 is provided for the cylindrical wall 10which has a peripheral flange 12 adapted for frictional engagement withthe lower portion of the wall. The bottom member 11 isformed with acentral'opening through which a sleeve is extended and secured toprovide an upwardly extending nipple 13 and a downwardly extendingnipple 14.

The cleaner housing is adapted to be suitably connected to a carburetorby means of a pipe or hose 15, which. engages the downwardly extendingni ple 14 and is secured thereto in any suitable manner as by means of aclamping ring 16.

The cleaner wall 10 also is provided with a removable top member or lid17 having a peripheral flange 18 adapted for frictional engagement withthe upper-marginal ortion of the wall. Fixed centrally to and ependingfrom the lid 17 is a gauzecylinder 19, which 1s adapted to extenddownwardly within the cleaner housing and to engage the upwardlyextending nipple 13 of the bottom member when the parts are assembled.

The cleaner housing is mounted in any suitable location, referably,beneath the hood of a motor ve icle and 11151. forwardly of the dash 20.

The means for admitting air to the cleaner housing includes a dampersleeve 21 of cylindrical form arranged near the top and to one side ofthe cylindrical wall 10 and communicating with the interior of thehousing on a line substantially tangential thereof.

The damper sleeve 21 preferably is extended through a hole 22in the dash20 and frictionally embraces a cylindrical dam er member 23. The dampersleeve 21 preferably is formed with two series of air entrance openingslocated on opposite sides of the dash 20.

The air entrance means comprises a plurality of slotted openings 24arranged circumferentially of the inner end port-ion of the sleeve 21and extending longitudinally thereof and a similar series of slottedopenings 25 near the free end of said sleeve or in other words, thatportion located within the vehicle body.

The slotted openings 24 are staggered relative to the slotted openings25 or in other words, are out of longitudinal alignment therewith.

The damper member 23 is formed witha series of slotted openings 26adapted to register at times with the slotted openings 24 of the sleeveand is also formed with a series of slot-ted openings 27 adapted toregister at times with the openings 25 of the sleeve.

The slotted openings 26 and 27 are in longitudinal alignment so thatwhen one set of openings of the damper member 23 are arranged toregister with the corresponding set of openings of the sleeve 21, itfollows that the other set of openings are out of registr The dampermember 23 is formed at its end with a handle 28 by which it may bemanipulated by rotating it slightly in the sleeve 21 to bring one set oranother of the openings into alignment.

Thus, I have provided means whereby air may be admitted to the cleanerhousing selectively either from the interior of the vehicle body or frombeneath the engine hood.

The cylindrical wall 10 is formed with a series of vertical slits toprovide exit openings 29, which preferably are in substantially the samehorizontal plane as the mouth of the sleeve 21. I

The material at the initial side of each slit 29, with reference to thedirection of travel of air in the housing, is bent to pro- .duce anoutwardly projecting lip 30, while the material at the opposite orterminal side is bent to form an inwardly projecting lip 31.

Since the air entering the cleaner housing comes in in a substantiallytangential stream, it follows that it travels in a circumferential pathwithin the housing so that dust and other foreign articles will becaused to pass out through t e openings 29 by centrifugal force. ,.Someparticles may, because of their weight, drop to the. bottom of thecleaner housing and to permit the escape of such articles, I haveprovided in the bottom memher: 11,.fa series of exit openings 32, whichare formedsimilarly to theexit openings 29. In othernwords, the exitopenings 32 have attheir initial-sides, outwardly extending lips H33Tand'at'theirkterminal sides, inwardly extending'lips34;

lt-willbeunderstood that airis drawn into ,the cleaner housing. by thesuction of the en- 'gine and travels with considerable force, so

Thus, the air supplied to the carburetor is very thoroughly andeffectively cleaned before being admitted to the fuel mixture.

By roviding the manual control means,

including the sleeve 21 and the damper member 23, I make it possible toselectively admit the air either from the interior or from a pointoutside thereof. At times, it may be desirable to take the air from thevehicle body and at other times, it may be undesirable to By arrangingthe control device so that air for the carburetor is drawn from theinterior of the vehicle body, I have made it possible not only to userelatively cleaner air for the fuel mixture, irrespective of the actionof the cleaner device itself, but have also provided for establishing acirculation and insuring a constant changepf air in the vehicle bodywhich is made effective by the suction of the engine.

The sleeve 21 is formed with radially extending ears 35 which aresecured to the dash 20 by bolts 36 or the like.

It is obvious that the lid 17 carrying the gauze cylinder 19 may beremoved whenever desired .for cleaning said cylinder of dust particleswhich may adhere thereto.

Also, that the bottom member 11 may be readily removed for cleaning outany foreign particles which may be contained therein.

I have provided a device of the character described, which is simple andinexpensive and which is easily installed and is eflicient for thepurpose for which it is designed.

I claim as my invention:

1. An air cleaning device comprising a cylindrical cleaner housing, anentrance opening thereto arranged substantially tan entially of thehousing wall, an air exit om said housing, a gauze cleaning memberarranged between the entrance and-exit openings, the housing wall beingformed with openings for the passa e of foreign substances bycentrifugal orce from the air assing from the entrance to the exitopenmg, the bottom of said housing also bein formed with openings forthe assage 0 foreign substances which may. rop from the passing air.

2. An air cleaning device comprising a cy formed with openings for theassa lindrical cleaner housing, an entrance opening theretonrrangedsubstantially tangentially of the housing wall, an air exit from saidhousing, a gauze cleaning member arranged between the entrance'and exitopenings, the housing wall being formed with opening: for the passage offoreign substances by centrifugal force from the air passing from theentrance to the exit opening, the bottom of said housing also being e offoreign substances which may rop rom the assing air, the openings ofsaid wall and ottom bein formed with marginal lips for directing sustances-outwardly of the housmg.

3. An air cleaning device comprising a cylindrical cleaner housing, anair entrance pipe leading to said housing and arranged arallel with butspaced from a diameter of said housing so that air passing to the housing will travel circumferentlally therein,

said housing being formed with openings in its side wall for the escapeof foreign objects in the air by centrifugal force, said housing beingformed with a substantially central air exit 0 ening, a gauze cleaningmember arrange concentrically in said housing and surrounding. the airexit opening said air entrance pipe being formed with iongitudinallyspace bular damper adjustably mounted relative to said pipe and formedwith openings adapted for selective registration with the openingstherein.

4. An air cleaning device for carburetors, comprising a cleaner housing,an air entrance pipe opening to said housing at one side of the centerthereof, an air exit opening spaced from the entrance opening, a finemesh cleaning member mounted in said housing between i the entrance andexit openings, means for permittin the passage of forei objects om theousing when separate from the air traveling from the entrance to theexit opening, said entrance pipe being formed with longitudinally spacedopenings for the admission of atmospheric air,

and a tubular damper adjustably mounted in said pipe and formed withopenings adapted to register selectively with the spaced openingsthereof.

Des Moines, Iowa, J ulglgl, 1928.

WILL M G. DUNN.

openings in its wall, and a tu- 4

